Sirius XM

SIRI • NASDAQ

Sirius XM is a entertainment company in the communication services sector on NASDAQ, led by Jennifer C. Witz, with a market cap of $7.3B. As of Q3 2025, 72% of shares are held by 525 institutional investors, with BERKSHIRE HATHAWAY INC as the largest holder at 37.06%.

Chief Executive OfficerJennifer C. Witz

Market Cap$7.3B

Entertainment

Communication Services

Employees5.7K

Websitesiriusxm.com

Country

United States of America

Overview

Overview of institutional ownership in SIRI as of Q3 2025 with a market cap of $7.8B

All Institutions

Institutions: 525
Value Held: $5.7B
Shares Held: 243.0M
Avg Position: $10.8M
Median Position: $360.5K

Hedge Funds

Hedge Funds: 63
Value Held: $416.4M
Shares Held: 17.9M
Avg Position: $6.6M
Median Position: $1.7M

Ownership Breakdown

Institutional (non-HF)

66.84%

$5.2B

Hedge Funds

5.31%

$416.4M

Retail & Other

27.85%

$2.2B

Based on market cap of $7.8B as of Q3 2025. Institutional (non-HF) excludes hedge funds to avoid double counting.

Biggest Investors

Institutions with the largest positions in SIRI as of Q3 2025

Institution	Key People	Position Value	Ownership	Owned Since	Total AUM (Long)
BERKSHIRE HATHAWAY INC Institution	Warren E. Buffett CEO	$2.9B 1.09% of portfolio	37.06% 124.8M shares	Q3 2023 Held for 2y 2m	$267.33B
VANGUARD GROUP INC Institution	Salim Ramji CEO	$434.7M 0.01% of portfolio	5.55% 18.7M shares	≤ Q2 2013 Held for 12y 5m+	$6.69T
B BlackRock, Inc. Institution	-	$201.6M 0.00% of portfolio	2.57% 8.7M shares	≤ Q2 2013 Held for 12y 5m+	$5.67T
K Kontiki Capital Management Ltd. Institution	-	$154.9M 8.24% of portfolio	1.98% 6.7M shares	Q2 2025 Held for 5 months	$1.9B
GEODE CAPITAL MANAGEMENT LLC ETF Provider	David Kenneth Lane CEO	$89.8M 0.01% of portfolio	1.15% 3.9M shares	≤ Q2 2013 Held for 12y 5m+	$1.57T
D D. E. Shaw & Co., Inc. Institution	-	$86.5M 0.07% of portfolio	1.10% 3.7M shares	Q3 2023 Held for 2y 2m	$115.81B
STATE STREET CORP Institution	Ronald P. O'Hanley CEO	$80.6M 0.00% of portfolio	1.03% 3.5M shares	≤ Q2 2013 Held for 12y 5m+	$2.88T
L LSV ASSET MANAGEMENT Long Only Manager	Josef Nmn Lakonishok CEO	$73.1M 0.16% of portfolio	0.93% 3.1M shares	Q4 2024 Held for 11 months	$45.1B
AQR CAPITAL MANAGEMENT LLC Hedge Fund•Multi-Strategy	David Gary Kabiller Founder	$63.4M 0.04% of portfolio	0.83% 2.8M shares	Q3 2015 Held for 10y 2m	$156.17B
AMERIPRISE FINANCIAL INC Institution	Jim Cracchiolo CEO	$61.3M 0.01% of portfolio	0.78% 2.6M shares	≤ Q2 2013 Held for 12y 5m+	$433.11B

Net Capital Flow

Institutional buying and selling activity for SIRI in Q3 2025

Traded: −$8.2M
Buyers: 213
Sellers: 234
Total Bought: +$424.8M
Total Sold: −$433.0M
Avg Position: $9.6M

Biggest Buyers

Institution	Net Bought	Current Position
BERKSHIRE HATHAWAY INC Institution	+$117.1M +5.0M shares	$2.9B 124.8M shares
CITADEL ADVISORS LLC Hedge Fund•Multi-Strategy	+$42.6M +1.8M shares	$57.7M 2.5M shares
C CANADA PENSION PLAN INVESTMENT BOARD Institution	+$35.2M +1.5M shares	$37.9M 1.6M shares
TWO SIGMA INVESTMENTS LLC Hedge Fund•Multi-Strategy	+$32.8M +1.4M shares	$45.0M 1.9M shares
C CHECK CAPITAL MANAGEMENT INC/CA RIA/Wealth	+$20.8M +895.2K shares	$48.0M 2.1M shares
TWO SIGMA ADVISERS, LLC Hedge Fund•Multi-Strategy	+$16.7M +717.3K shares	$16.7M 717.3K shares
Toroso Investments, LLC ETF Provider	+$13.1M +561.6K shares	$26.5M 1.1M shares
J Jump Financial, LLC Institution	+$12.5M +535.1K shares	$12.5M 535.1K shares
H HRT FINANCIAL LLC Institution	+$11.2M +483.2K shares	$11.2M 483.2K shares
VOLORIDGE INVESTMENT MANAGEMENT, LLC Hedge Fund•Multi-Strategy	+$7.7M +331.8K shares	$8.6M 367.5K shares

Biggest Sellers

Institution	Net Sold	Current Position
Point72 Asset Management, L.P. Hedge Fund•Multi-Strategy	−$65.6M −2.8M shares	$32.1M 1.4M shares
AQR CAPITAL MANAGEMENT LLC Hedge Fund•Multi-Strategy	−$54.9M −2.4M shares	$63.4M 2.8M shares
MILLENNIUM MANAGEMENT LLC Hedge Fund•Multi-Strategy	−$41.6M −1.8M shares	$7.7M 331.6K shares
DIMENSIONAL FUND ADVISORS LP Long Only Manager	−$36.9M −1.6M shares	$7.6M 325.9K shares
BANK OF AMERICA CORP /DE/ Institution	−$26.2M −1.1M shares	$20.3M 872.6K shares
C Cubist Systematic Strategies, LLC Institution	−$18.0M −773.9K shares	$6.6M 282.2K shares
M Man Group plc Institution	−$17.7M −760.3K shares	$2.3M 97.7K shares
MORGAN STANLEY RIA/Wealth	−$15.5M −667.2K shares	$50.5M 2.2M shares
VANGUARD GROUP INC Institution	−$15.1M −647.3K shares	$434.7M 18.7M shares
D D. E. Shaw & Co., Inc. Institution	−$10.7M −458.4K shares	$86.5M 3.7M shares

Entry and Exit Activity

Institutions that initiated new positions or completely exited SIRI in Q3 2025

New Positions: 23
New Value: $5.0M
Exited Positions: 66
Exited Value: $24.9M

New Positions

Institution	Position Value
F Fieldview Capital Management, LLC Hedge Fund•Long/Short	$1.7M 74.7K shares
Q Quantessence Capital LLC Hedge Fund•Quant	$882.2K 37.9K shares
Graham Capital Management, L.P. Hedge Fund•Multi-Strategy	$849.8K 36.5K shares
Q Qsemble Capital Management, LP Hedge Fund•Quant	$580.9K 25.0K shares
LETSON INVESTMENT MANAGEMENT, INC. RIA/Wealth	$555.6K 23.9K shares
Union Bankshares Corp Institution	$333.2K 14.3K shares
S Security National Bank Institution	$46.6K 2.0K shares
LRI Investments, LLC RIA/Wealth	$11.6K 500.0 shares
A Advantage Trust Co Institution	$11.6K 500.0 shares
B Binnacle Investments Inc Institution	$11.6K 500.0 shares

Exited Positions

Institution	Previous Position
HBK INVESTMENTS L P Hedge Fund•Multi-Strategy	$3.6M 157.9K shares
O Old West Investment Management, LLC Hedge Fund•Multi-Strategy	$3.2M 140.4K shares
THRIVENT FINANCIAL FOR LUTHERANS Insurance Manager	$2.7M 116.5K shares
S SCHWERIN BOYLE CAPITAL MANAGEMENT INC Hedge Fund•Multi-Strategy	$2.3M 102.1K shares
Blueshift Asset Management, LLC Hedge Fund•Quant	$1.6M 71.8K shares
Y Y-Intercept Ltd Institution	$1.5M 64.7K shares
S Squarepoint Ops LLC Hedge Fund•Quant	$1.1M 48.7K shares
Scientech Research LLC Hedge Fund•Market Neutral	$910.1K 39.6K shares
WORLDQUANT MILLENNIUM QUANTITATIVE STRATEGIES LLC Hedge Fund•Multi-Strategy	$880.2K 38.3K shares
Centiva Capital, LP Hedge Fund•Multi-Strategy	$852.1K 37.1K shares

Options Activity

Institutions with the largest Call and Put options positions in SIRI as of Q3 2025

Call Positions: 25
Call Value: $350.1M
Put Positions: 19
Put Value: $150.1M

Call Positions

Institution	Position Value
SUSQUEHANNA INTERNATIONAL GROUP, LLP Private Equity	$166.8M 71.6K contracts
J JANE STREET GROUP, LLC Institution	$47.3M 20.3K contracts
CITADEL ADVISORS LLC Hedge Fund•Multi-Strategy	$32.3M 13.9K contracts
Toroso Investments, LLC ETF Provider	$25.6M 11.0K contracts
HBK INVESTMENTS L P Hedge Fund•Multi-Strategy	$24.1M 10.4K contracts
W WOLVERINE TRADING, LLC Institution	$9.6M 4.2K contracts
MILLENNIUM MANAGEMENT LLC Hedge Fund•Multi-Strategy	$8.9M 3.8K contracts
D D. E. Shaw & Co., Inc. Institution	$5.7M 2.5K contracts
CAPITAL FUND MANAGEMENT S.A. Hedge Fund•Quant Macro	$5.5M 2.4K contracts
BALYASNY ASSET MANAGEMENT LLC Hedge Fund•Multi-Strategy	$4.3M 1.9K contracts

Put Positions

Institution	Position Value
SUSQUEHANNA INTERNATIONAL GROUP, LLP Private Equity	$71.3M 30.6K contracts
J JANE STREET GROUP, LLC Institution	$19.0M 8.2K contracts
CITADEL ADVISORS LLC Hedge Fund•Multi-Strategy	$16.2M 7.0K contracts
Walleye Trading LLC RIA/Wealth	$9.1M 3.9K contracts
CAPITAL FUND MANAGEMENT S.A. Hedge Fund•Quant Macro	$8.5M 3.7K contracts
T Twin Tree Management, LP Hedge Fund•Vol Arbitrage	$6.4M 2.7K contracts
W WOLVERINE TRADING, LLC Institution	$4.2M 1.8K contracts
MILLENNIUM MANAGEMENT LLC Hedge Fund•Multi-Strategy	$4.1M 1.8K contracts
P PEAK6 LLC Institution	$2.7M 1.2K contracts
WOLVERINE ASSET MANAGEMENT LLC Hedge Fund•Multi-Strategy	$2.3M 1.0K contracts

Most Committed Institutions

Institutions with SIRI as the highest % of their portfolio as of Q3 2025

Institution	Key People	Portfolio Weight	Ownership	Owned Since	Total AUM (Long)
B BISLETT MANAGEMENT, LLC Hedge Fund•Value	James David Harris Managing Partner	12.53% $17.3M	0.22% 743.3K shares	Q3 2023 Held for 2y 2m	$138.1M
W WITTENBERG INVESTMENT MANAGEMENT, INC. RIA/Wealth	Joel Wittenberg President	10.37% $25.9M	0.33% 1.1M shares	Q2 2024 Held for 1y 5m	$250.3M
Doma Perpetual Capital Management LLC Hedge Fund•Value	Pedro Escudero CEO	9.05% $27.0M	0.34% 1.2M shares	Q3 2024 Held for 1y 2m	$297.8M
K Kontiki Capital Management Ltd. Institution	-	8.24% $154.9M	1.98% 6.7M shares	Q2 2025 Held for 5 months	$1.9B
C Chou Associates Management Inc. Institution	-	7.88% $16.3M	0.21% 702.5K shares	Q3 2024 Held for 1y 2m	$207.6M
swisspartners Advisors Ltd RIA/Wealth	Dominique Joerg Spillmann CEO	7.03% $8.6M	0.11% 366.8K shares	Q3 2024 Held for 1y 2m	$121.7M
T TOWERVIEW LLC Institution	-	5.68% $7.8M	0.10% 335.3K shares	Q2 2024 Held for 1y 5m	$137.4M
Hi-Line Capital Management, LLC RIA/Wealth	Matthew Thomas Roby President	3.94% $12.5M	0.16% 535.8K shares	Q3 2024 Held for 1y 2m	$316.8M
H Hall Kathryn A. Institution	-	3.29% $6.1M	0.08% 262.0K shares	Q3 2024 Held for 1y 2m	$185.5M
C CHECK CAPITAL MANAGEMENT INC/CA RIA/Wealth	Steven Glenn Check President	3.09% $48.0M	0.61% 2.1M shares	Q3 2024 Held for 1y 2m	$1.6B

Hedge Fund Spotlight

Discover hedge funds investing in SIRI

FOX RUN MANAGEMENT, L.L.C.

Hedge Fund • Quant

Portfolio ManagerSandeep Kumar

Portfolio Value: $640.3M
Positions: 870
Last Reported: Q3 2025

Sector Allocation

Position in Sirius XM

Market Value: $1.5M
Shares Held: 66.1K
Portfolio Weight: 0.24%
Owned Since: 2024-Q4

Top Holding	Sector	Market Value	Weight
1 Energy Select Sector SPDR Fund XLE	ETF ETF	$7.7M	1.20%
2 Financial Select Sector SPDR Fund XLF	ETF ETF	$4.3M	0.67%
3 iShares U.S. Real Estate IYR	ETF ETF	$3.9M	0.61%